(bug report) Starting zsh takes ~5 seconds with the latest commits after 20th of September with big history file

[Evgeny Burmentyev <vir.found@xxxxxxxxx>]

Linux arch 2.6.35-ARCH #1 SMP PREEMPT Tue Sep 21 11:00:23 UTC 2010 i686
Intel(R) Core(TM)2 Duo CPU T5870 @ 2.00GHz GenuineIntel GNU/Linux
HISTSIZE=50000
SAVEHIST=50000

With the current version from cvs:
Output of $strace zsh
http://sprunge.us/bKCj
Output of $time zsh (and ^D right after it)
zsh  10.35s user 0.06s system 82% cpu 12.613 total

With the version from cvs prior to 2010-09-10:
Output of $strace zsh
http://sprunge.us/behC
Output of $time zsh (and ^D right after it)
zsh  1.29s user 0.03s system 72% cpu 1.825 total

I did only these tests, but I'm pretty sure, it began not before 20th of
September. I use zsh on daily basis and try not to miss new commits.
And this huge delay happens not only when starting zsh, but after
logging off it as well (^D). Otherwise ok.